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std::basic_string::front(3) C++ Standard Libary std::basic_string::front(3) NAME std::basic_string::front - std::basic_string::front Synopsis CharT& front(); (since C++11) (until C++20) constexpr CharT& front(); (since C++20) const CharT& front() const; (since C++11) (until C++20) constexpr const CharT& front() const; (since C++20) Returns reference to the first character in the string. The behavior is undefined if empty() == true. Parameters (none) Return value reference to the first character, equivalent to operator[](0). Complexity Constant Example // Run this code #include <iostream> #include <string> int main() { { std::string s("Exemplary"); char& f = s.front(); f = 'e'; std::cout << s << '\n'; // "exemplary" } { std::string const c("Exemplary"); char const& f = c.front(); std::cout << &f << '\n'; // "Exemplary" } } Output: exemplary Exemplary See also back accesses the last character (C++11) (public member function) front accesses the first character (C++17) (public member function of std::ba- sic_string_view<CharT,Traits>) http://cppreference.com 2022.07.31 std::basic_string::front(3)
NAME | Synopsis | Parameters | Return value | Complexity | Example | Output: | See also
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